yep it is normal, it's a positive thing that your husband is enjoying your side of the families life. but if you feel that you think it's not normal you should keep a close eye on your husband, or confront him about it constructively.
depends was it sexual
Depends, if its on the cheek its normal or on the mouth its also normal to certain levels, so Yes, its very normal it just means she loves you <3
yes Islam allowes you to kiss your real sister on her head or a light kiss on her Cheek
a french kiss uses tounge, and a normal kiss is all lip
get very jealous and hurt my sister if i see her kiss my girlfriend. sex them up
Kiss his sister first
A kiss can be just a normal kiss but it depends on your relationship with that person. If your just friends then its a normal friendly kiss but if your going out then its 'I really like you" and such kiss
Just kiss her
Why would you even think of that IS she adopted
No, of course not! Kissing any family member on the cheek is not bad, you are just showing affection toward your family. It is completely normal! Be thankful you have your family!